Who is Ibrahim Hassan al-Asiri, the Saudi bomb-maker believed to be in Yemen with AQAP the last few years? And why is he a suspect in the cargo escapade?

Remember the story of the young Saudi who joined AQAP, repented and asked for a meeting with Prince Mohammed bin Nayef, the Saudi Deputy Interior Minister who handles the country's counter-terrorism matters? And how in August, 2009,right before Ramadam, a meeting was set up between the Prince and the young Abdullah Hassan Taleh al-Asiri, so that al-Asiri could surrender and enter Saudi Arabia's much acclaimed rehabilitation program. It was expected to be a major media event, and another chance for the Saudis to show off their program.

Al-Asiri was admitted to the palace, underwent a number of checks, and then met with the prince. An ied hidden on his body (believed then to have been hidden in his rectum) exploded, killing Asiri but not harming the Prince. He wasn't close enough. The IED was composed of PETN.